adjective
1.
a. : having the owner's name entered in a register
a registered security
b. : recorded as the owner of a security
registered holders of a stock
2. : recorded on the basis of pedigree, possession of breed characteristics, or both in the studbook of a recognized breed association
a registered Holstein
a registered Percheron
3.
a. : qualified formally or officially (as by passage of an examination or licensing) to perform a specified function or practice a specified skill or function
a registered lobbyist
a registered architect
a registered hospital
b. : qualified officially to vote
as a registered Democrat he maintains his legal residence in New Mexico — Current Biography